Electric-arc lamp.



ARTHUR GEORGE WAY, or LONDON, ENGLAND.

EtEo'rniO-ARC LAMP.

To all whom t 'may conce/Mt:

Be it known that I, ARTHUR GEORGE Vilar, subjecty of the King ofEngland, residingat London, in-England, have invented certain `new andusefull Improvements. in

Electric''Arc Lamps, of which the following l.is a spec'ication..

This -invention' relates to electric arc lamps of the type usedinlanterns, projectors andA the like.: Such arc lampsv hitherto 'have'either been of ,the open type'withcarbons inclined'at an angle to eachother, or of the'in closed type with 'cai-bons in a. vertical line.-.Eatih of these types has' disadvantages, 'the open form. consuming thecarbons very rapidly. and thus, if hand-regulated, requiring 'constantattent-ion, and the closed forni wit-hverticall carbons being unsuitablefor use with standardlanterne o-r apparatus on ac# count of the largeamount ofl headlrooin required and .alsocaiising considerable loss of lv illumination owing to the crater of the carbons being'in the wrongdirection. A further disadvantage of the' open type is that thegarcis'eiitir'ely'unprotected. andlikely to cause lire.

'The present invention embodies various .improved constructionalfeatures, one being that the are is practically inclosed although thecarbons are at right angles to each other, one of the4 lcar'loons being.substantially horizontal and 'passing through an opening inade Vtoreceive it in theinclosing .cover or casing ort Aglass or othertransparent material; An-

' other lfeature is the arrangein'entfor feeding this horizontal carbonby nieans of a ring clutch operatedbv a hand lever. v

rlhe invention also includes other details of construction.hereinafterdescribed and. shown in the acdornpanying drawings, i-n.

which- Figure l is a side elevation, and Fig. 2 is a plan of oneconstruction of lantern or projector arcl lanip according to thisinvention. .Upon a tray or base .A adapted to t into the 4lantern orprojector, is a plate or table -B haring lugs B1 which are engaged bypivot projectors. The front end ofthe plate B is. furnished with lugs B2and to each oitheser' is* pivoted a link D, the other ends of/thev,Specification of Letters Patent.

Patented May 2'?, 1913.

Applieation tiled April l, -1911. Serial No. 6 1'-8,333.

.links being pivotally connected to a'y'o'ke E which` can 'be made -toslide backward. andforward along the base A4 by the rotationfo'f a screwFfurnished with a milled head F1.'-

lThe frontendv of this' screw is held in alug A? forming part of thebase A and it passes through atapped hole lin the yoke E. Thus',

by turning the milled head Fil, the yoke E is forced one way or theother along the screw F, the angular'posit-ion. ofthe-links D is.

'alteredl land the front end of theplate Yraised or'lowred..y Thismotionis for purposes of adjustment after'the initial position for'height hasbeen determined by the -piv otsC.

l-Pivoted as'at G tothe plate B is acarrier *platexH having an extensionH1 furnished with alug H2. through which passes a cross traverse screwJ. This screw is mounted in bearings in'I lugs B3 on the'plateBand is'provided 'with awheel'or disk H3 by means 'of which it can -be turned.This rotary 'motion of'the screw J turns the plate H' about its center"at G.

' Secured to thefplate H', but insulated trein it, is a circular plate Kflanged to receive a cylindrical casing L of glass or other transparentinaterial which is provided at its upper end with ya cover L1. The plateK is furnished witha downwardy extending boss or-stein K1 which passesthrough a hole in the carrier plate H and is boredto take a slidingcarrier or liolderfor'the bottoni yca rbon lvl. g This carrier' is notshown in the drawings but' it may be of any convenient forni and itis'provided with a rack operated by-a pinion M1 at the end of a spindlelv'l? having a milled head lvl. The rotation of the spindle M2 'willthus cause the lower car-l bon M to be raised and lowered in the usualway.

As will be seen from Fig. 1, the upper carbon N issubstantiallyhorizontal, that is. at right angles to the lower vertical carbon M.' Itpasses through holes made to large enough to allow the vcarloon N toslide through it lwhen the clutch plate is prac# yti'cally at rightangles to the carbon.- Pivoted tothe bracket l? is a lever .S having avhandle S1 and positioned so thatit acts upon mpejectee er eil' mi theelueh plaie E. Thus-1f the handle S1 be mused. "elle clutch f u q 7" 1'plate R lsirst shghy eee-Keel se me is 'Upon the release ef the leverhandle S15 'the lsg'ning/ll Causes the elu'ch plaie again t' assume itsnorm-al position Arelellxv'elgzf 'te `the carbon N, and carries it beckove? the carbon to lts postlon of rest es shown In 'eylinler L andp'efemblyts que closely other purposes requ'ngestongly eetn 1 .Vase

light,v the'lnlet 'llmay, be closed s0 {sheipra'ctlcally nomi' isacl'mlted Wltlqm the cylln order te control are -m the well known wey,ajn elee-emagnetll 1s tecl to the cerner plete 'El and -may beveormeeecl in series With-ehe carbone.

A permenenbmagnet may .be *used for this purpose mstead of ytheeleetromagnes shown.

x The arra-ngement of the -hanel-epereefl clutch' for feeding thehorizont-al carbn is of material advantage o'rila-ntern and ple jectr'Work as e :considerable 'saving 4of lengt-l1 is e'eeteol compared withthev space occupied by a rack and pinion.

in smaller lamps she inclosing cylinder L Vme? be placed eccentficallyWli regard@ v the. lowereebon M m order *lo prevent undue heang 'orclepest 01E- carbon clust in flee du'ectlon oi 'elle projectlon vof themfc.v Fue-- -'t`-her,j1'n sueli small forzrns,l the meelleeism fel'raising and, lowering the lamp' and fee -t'urning it slightly,l may be"simplied. Fm

example, heplat'e B 'bearing thelemp malghe:

be mounted-se es io sll'eup end' 'flown enel A .upglls time e insurable,e elmell plate, suppored en end -e seeendeerben bet-Ween seidupright, elever fulcrumecl below the seeving acleped te' the direction of the'plaie n; y

3.Tl1e eemfomalou mn Meeus O' :L .L p

the Character elesefbeel, ef e, besei e liable -Va-eying the 'Melina-m'means for illus 2m Leeeeee turn beevefll'eel piller' in elle menne?usuel Wbpmjeeen lamps.

Y'Vlm; l el es my invention mil .desire Jae secure ley Melese Paten@ isl. le an eleere efe lmnp, she Combine tien of e re. AWely eelonayupright ce1, ben; e cesmg surrelmdmg smal carbon, e.l

seeend eearbee exendng through en epeetue in the s iale. Wall ef *alleeasing, means for suppor'ng the Segond cereale arranged eutslele of'L/lle casing and eenwesing ltwo which ille carbon is freely and enel.actuele Clutch l 1e-ie ie :Se-eel' "elle carbon .into Ahe casingg and ecelecl spring surseeen eezbon and engegmg 4 rounding the supper? 1011sind.A ea'lfben to move the f-2. The com?pq '.eppeetus ef Connecting'thel mosme" the yoke ef Velle sable? e. eefme" plzue pvot-elly meenteelen 'he te 1 im 1n ving the plete, and en mei.

lin sesbmemy whereof' I have sily neme "te -hls speemeetlen m the 'p citive sul-jseibng .'Witnesses,

ARTHUR GEORGE We Witnesses:

TW..- MEACBER,

HERBERT le; ,Gmee

bese, e yoke- 'vsr f the nell'uatlen mfg meuntef on ehe

